What is CVE-2017-4919?

CVE-2017-4919 is a critical-severity vulnerability in VMware Vcenter Server, classified under Missing Authentication for Critical Function. CVSS score: 9.0/10. Published 2017-07-28.

How severe is CVE-2017-4919?

Critical severity. CVSS v3 base score is 9.0 out of 10.

Auth bypass in VMware Vcenter Server

CVE-2017-4919

VMware vCenter Server 5.5, 6.0, 6.5 allows vSphere users with certain, limited vSphere privileges to use the VIX API to access Guest Operating Systems without the need to authenticate.

Vulnerability class: Broken Authentication

Published 2017-07-28 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.0 (Critical). Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.020 (80.3th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 80th percentile — 80.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.020 · newest: 0.020 · change: 0.000

Affected products

VMware Vcenter Server — versions 5.5, 6.0, 6.5
VMware Vcenter Server — versions VMware vCenter Server 5.5.x, 6.0.x, 6.5.x

Weakness classification (CWE)

CWE-306 — Missing Authentication for Critical Function

References

www.securitytracker.com/id/1039004 (VDB Entry, Third Party Advisory, vdb-entry)
www.vmware.com/security/advisories/VMSA-2017-0012.html (Mitigation, Vendor Advisory)
www.securityfocus.com/bid/100102 (VDB Entry, Third Party Advisory, vdb-entry)

Frequently asked questions

What is CVE-2017-4919?: CVE-2017-4919 is a critical-severity vulnerability in VMware Vcenter Server, classified under Missing Authentication for Critical Function. CVSS score: 9.0/10. Published 2017-07-28.
How severe is CVE-2017-4919?: Critical severity. CVSS v3 base score is 9.0 out of 10.